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Date: Fri, 07 May 1999 17:12:07 -0700
From: John Walker <techdive@ea*.ne*>
Organization: Reel Scuba
To: velema@cu*.ne*
CC: techdiver@aquanaut.com
Subject: Re: bottle markings / gas switching

One breath?  Probably not but, EXPECT IT TO!  

   I would suggest you pressurize you regs to keep the water out of
them.  This will also give you one last opportunity to check you gas
supply(pressure) before commiting to the dive.

     John

Robbert wrote:
> 
>  bottle markings / gas switching
>  continue the descent
> 
> What if: one took 1 breath of 100% O2 at lets say 70", notice that you
> have the wrong one (because the valve is closed) and switch to the
> wright one. Can 1 breath do any harm?
> 
> Is it nescessary to pressurize all regs before descent?
> 
> Robbert van der Gon Netscher
> Curaçao
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